package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.Page;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    private final AddressBookMapper addressBookMapper;
    private final ShoppingCartMapper shoppingCartMapper;
    private final OrderMapper orderMapper;
    private final OrderDetailMapper orderDetailMapper;
    private final UserMapper userMapper;
    private final WeChatPayUtil weChatPayUtil;
    private final WebSocketServer webSocketServer;

    public OrderServiceImpl(AddressBookMapper addressBookMapper, ShoppingCartMapper shoppingCartMapper,
                            OrderMapper orderMapper, OrderDetailMapper orderDetailMapper, UserMapper userMapper,
                            WeChatPayUtil weChatPayUtil, WebSocketServer webSocketServer) {
        this.addressBookMapper = addressBookMapper;
        this.shoppingCartMapper = shoppingCartMapper;
        this.orderMapper = orderMapper;
        this.orderDetailMapper = orderDetailMapper;
        this.userMapper = userMapper;
        this.weChatPayUtil = weChatPayUtil;
        this.webSocketServer = webSocketServer;
    }

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        // 1、处理各种业务异常（地址簿为空、购物车数据为空）
        // 地址簿为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        // 购物车数据为空
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.isEmpty()) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        // 2、向订单表插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress(addressBook.getDetail());

        orderMapper.insert(orders);
        Long ordersId = orders.getId();

        List<OrderDetail> orderDetailList = new ArrayList<>();
        // 3、向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(ordersId);
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailList);

        // 4、清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(userId);

        // 5、封装vo返回结果
        return OrderSubmitVO.builder()
                .id(ordersId)
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//
//        return vo;

        // TODO 取消微信支付，mock数据
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        // 为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改
        Integer OrderPaidStatus = Orders.PAID;  // 支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  // 订单状态，待接单

        // 发现没有将支付时间check_out属性赋值，在这里更新
        LocalDateTime checkTime = LocalDateTime.now();

        // 获取订单号码
        String orderNumber = ordersPaymentDTO.getOrderNumber();

        log.info("调用updateStatus,用于替换微信支付更新数据库状态的问题");
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, checkTime, orderNumber);

        // TODO 微信支付屏蔽后websocket问题
        // 通过websocket向客户端浏览器推送消息
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(orderNumber);
        Map map = new HashMap();
        map.put("type", 1); // 1表示来单提醒，2表示客户催单
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号：" + orderNumber);

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        // 通过websocket向客户端浏览器推送消息
        Map map = new HashMap();
        map.put("type", 1); // 1表示来单提醒，2表示客户催单
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号：" + outTradeNo);

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    /**
     * 查询历史订单
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult list(OrdersPageQueryDTO ordersPageQueryDTO) {
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> ordersPage = orderMapper.query(ordersPageQueryDTO);

        List<OrderVO> orderVOList = new ArrayList<>();

        if(ordersPage != null && ordersPage.getTotal() > 0) {
            List<Orders> ordersList = ordersPage.getResult();
            for (Orders orders : ordersList) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                long orderId = orders.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
                orderVO.setOrderDetailList(orderDetailList);
                orderVOList.add(orderVO);
            }
        }

        return new PageResult(ordersPage.getTotal(), orderVOList);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO getOrderById(Long id) {
        Orders order = orderMapper.getById(id);

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(order, orderVO);

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 用户取消订单
     * @param id
     */
    @Override
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders orderById = orderMapper.getById(id);

        // 判断订单是否存在
        if (orderById == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (orderById.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(orderById.getId());

        // 订单处于待接单状态下取消，需要进行退款
//        if (orderById.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    orderById.getNumber(), //商户订单号
//                    orderById.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
//
//            //支付状态修改为 退款
//            orders.setPayStatus(Orders.REFUND);
//        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    @Transactional
    public void repetition(Long id) {
        // 根据订单id获取订单详情信息
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);

        // 根据查到的订单详情信息构造购物车信息
        List<ShoppingCart> shoppingCartList = new ArrayList<>();
        for (OrderDetail orderDetail : orderDetails) {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail, shoppingCart);
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCartList.add(shoppingCart);
        }

        // 插入新购物车信息
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.query(ordersPageQueryDTO);


        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 根据order列表构造orderVO列表
     * @param page
     * @return
     */
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);

                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 拼接订单中菜品信息
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        List<OrderDetail> orderDetailL = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*2）
        List<String> orderDishList = orderDetailL.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接到一起
        return String.join("", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO = OrderStatisticsVO.builder()
                .toBeConfirmed(toBeConfirmed)
                .confirmed(confirmed)
                .deliveryInProgress(deliveryInProgress)
                .build();
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        // 根据id查询订单
        Orders ordersInfo = orderMapper.getById(ordersConfirmDTO.getId());

        // 订单状态必须是待接单
        if (ordersInfo == null || !ordersInfo.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单信息
        Orders ordersInfo = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单状态必须是待接单
        if (ordersInfo == null || !ordersInfo.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
//        Integer payStatus = ordersInfo.getPayStatus();
//        if (payStatus.equals(Orders.PAID)) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersInfo.getNumber(),
//                    ordersInfo.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = Orders.builder()
                .id(ordersRejectionDTO.getId())
                .status(Orders.CANCELLED)
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .cancelTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        // 根据id获取订单
        Orders ordersInfo = orderMapper.getById(ordersCancelDTO.getId());

        // 判断订单是否存在
        if (ordersInfo == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //判断订单状态
        if (ordersInfo.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());

        // 订单处于待接单状态下取消，需要进行退款
//        if (orderById.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    orderById.getNumber(), //商户订单号
//                    orderById.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
//
//            //支付状态修改为 退款
//            orders.setPayStatus(Orders.REFUND);
//        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        // 根据id查询订单信息
        Orders ordersInfo = orderMapper.getById(id);

        // 判断订单是否存在
        if (ordersInfo == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        // 判断订单状态是否是待派送
        if (!ordersInfo.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void completeOrder(Long id) {
        Orders ordersInfo = orderMapper.getById(id);

        if (ordersInfo == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        if (!ordersInfo.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders ordersInfo = orderMapper.getById(id);

        if (ordersInfo == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map map = new HashMap();
        map.put("type",2); // 1为来单提醒，2为客户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + ordersInfo.getNumber());

        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
